Men with longer ring fingers may have a lower chance of dying from the coronavirus and could be more likely to face mild symptoms, according to a new study published in the journal Early Human Development.
The reason? The length of ring fingers is believed to be linked to how much testosterone men are exposed to in utero — the longer the finger, the greater the hormonal exposure. And testosterone is believed to protect against severe coronavirus-related illness because it increases the concentration of angiotensin-converting enzyme 2 (ACE2) in the body. (…)
Manning, J.T., & Fink, B. (2020). Understanding COVID-19: Digit ratio (2D:4D) and sex differences in national case fatality rates. Early Human Development, 146, 105074.